public class Card
{
    Private String  number;
    Private int balance;
    Private int bonus;
    void store(int money)
    {
        if(money > 0)
        {
            this.balance += money;
            if(money >= 1000){this.bonus++;}
        }
        else
        {
            System.out.println("error!");
        }
    }
    int getBalance(){
        return balance;
    }
    int getBonus(){
        return bonus;
    }
    String getNumber(){
        return number;
    }
}
